Oil bath rotary



Aug. 29, 1939. E. E. GREVE OIL BATH ROTARY Filed April 11, 1955 2Sheets-Sheet 1 INVENTOR.

N BY EDG'AEZ GEEl E.

ATTORNEYS Aug. 29, 1939.. E. E. GREVE OIL BATH ROTARY Filed April 11,1935 2 Sheets-Sheet 2 Will/III] I INVENTOR EzaeAeEGka/E.

w w I :WWQRE- N5 l b Q -m Q N ps ATTORNEYS Patented Aug. 29, 1939 pFFlCE 2,171,176 on. BATH no'rAnY EdgarE. Grave, Dallas,

Tern, assignor to (Oil Well Supply Company, IlallaaTen, acorporation ofNew Jersey Application April 11, 1935, Serial no. 15,179 3 Claims, (or.255 -23) My invention relates to rotaries which may be used in drillingoil wells and is so constructed that an arcuate alignment of thebearings is.

ensured without the necessity for shimming and in which the parts of therotary are effectively lubricated.

This application is a continuation in part of on a rotatable shaftjournalled in suitable bearings.

vI-Ieretofore in mounting the driving shaft it has V v shaft and,therefore, avoids the neces'sity'ior any been customary to align it bythe use of shims and the accurate alignment, therefore, depended uponthe skill of the workmen. Where the shaft has been removed forinspection or repair and I replaced in the field, such alignment is aptto be imperfect because of lack of facilitiesorlack of skill on the partof the wcr'kmeniil j,

I My invention provides aymounting for the driving shaft of rotaries inwhich the accurate alignment of the drive shaft is ensured withoutspecial shims or adjustments as the 'shaftis in-- serted in position,and also provides an effective means sealed from the entrance of dust ormois- I ture for thoroughly lubricating the bearings-1 of serted 1 withits pi'nion, the bearing slide into the openings provided for them. r r

the shaft.

The various features of the invention are illustrated by way of examplein the accompanying .35 drawingsrin whichr Fig. 1 is a plan view of arotary embodying a preferred form of the invention. I I Fig. 2 is avertical section of the rotary taken on line 22 of Fig. 1. p Fig. 3 is apart plan view of a modified mounting for the drive shaft.

Fig. 4 is a vertical section taken, on the line 4-4 of Fig. 2.

In the embodiment illustrated in theaccompanying drawings the inventionisshown as applied to a. rotary in which the anti-friction thrust fbearings for the rotary table and the gears and pinions for driving thelatter are enclosed in a chamber which is partly vfilled with oil asdescribed in detail in the parent applicationSe'rial No. 523,756, nowPatent No. 2,009,176, of which the present application is'a continuationin-part.

In my present invention the drive shaft which extends radially intotheoil containing chamber. ofthe-rotary, is mountedin a pair of spacedbearings carried in fixed supports on an integral extension of the baseof the rotary. The oil containing chamber has an opening through whichthe drive shaft extends and the inner hearing for the drive shaft ismounted in this open- 5 ing, while the outer bearing is mounted inspaced relation thereto. The opening for the inner bearing is preferablylarge enough to permit the insertion of the pinion mounted on the shaft,and the bearing support, or bearing itself, has an 10 outside diametersuficient to close and seal this opening. The bearing or hearingmounting is also provided with a flange through which it may adjustmentto secure alignment. Similarly, the outer bearing is mounted-in astandard having an 20 "opening to'receive and position the. bearing forthe outer end of the shaft. The bearing or bear- 5 ing housing may bebolted to this standard in a manner similar to the securing of the innerbearing, and thus ensures an accurate alignment 25 for theouter end, ofthe shaft.

A drive sprocket'for the drive shaft may be mounted either betweenbearings or on a shaft extension beyond the outer bearing. In Iassembling the shaft, the bearings are 30 mounted on the shaft and asthe latter is in- "In theaccompanying drawings the invention isdisclosedas embodied in the oil bath rotary 35 of parent application Serial No.523,756, in which the rotary table I0 is rotatably mounted one base IIby means of an anti-friction thrust bearing comprising the rollers H.The rollers l2 run on a lower raceway l3 and support an upper 40 racewayll that directly supports the table l0.

A'be'vel gear ring I5 is mounted on'the lower face of the table i0 andmeshes with a drive pinion i6 carried on a drive shaft ll. Theantifricti'on thrust bearings. l2, l4, andthe pinion 45 I6 and gear I!are all enclosed within an annular chamber l8 formed between'the base Hand the table l0 and enclosed by an outer wall 19 extending from thebase ll upwardly to the peripheral under surface of the table l0withwl'iich itseals 5 through a sliding seal 20. The inner wallof thisannular oil chamber is formed by a skirt I 2| depending downwardly fromthe table in and sealing into an opening in the base ll.

,Inthis arrangement an oil reservoir 22 is pro- 55 vided into which theteeth of the pinion l6 dip so that lubricant is carried upwardly ontothe teeth of the gear Hi from which it drips downwardly into the lowerraceway l3 and back through an opening 23.

The wall It is provided'near the reservoir 22 with an opening throughwhich the shaft I'I extends and in which a bearing housing 24 for theshaft I! may be mounted. The wall about this opening may be thickenedsomewhat as in.- dicated at 25 in Fig. 2, and may be strengthenedsidewise by means of abutments or standards 26 as indicated in. Fig. l.Theopening is also of suiiiciently large diameter to admit the insertionof the pinion l6 when the table II) is removed or raised. The bearinghousing 24 fits into the opening in the wall of the oil chamber and,therefore, has an outside diameter somewhat larger than the largestdiameter of the pinion IS. The opening in the wall and the bearinghousing 24 fit closely and are so positioned that when the bearinghousing is inserted, the shaft I1 is properly aligned at its inner endand the pinion I6 is in position to mesh with the gear IS.

The base ll extends integrally sidewise as at 26', or outward beyond thewall l9 below the shaft I l, and at its outer end is provided with anintegral bearing standard 21 provided with an opening to receive abearing housing 28. This bearing housing closely fits the openingthrough the-standard 21 and is aligned with the opening through the walll9 so as properly to align the outer end of the shaft l1.

The bearings housings 24 and 28 are provided with flanges 29 and 30,respectively, which fit against the outer surfaces of the wall I9 andthe standard 21, respectively, and may be bolted thereto by means ofbolts 3| and 32. These bolts pass into prepared bolt holes in the walll9 and in the standard 21, respectively, to position the bearinghousings 24 and 28. The inner surface of the housing 24 is provided witha seal 33 closing it tightly about the shaft l1 and sealing it from theoil chamber l8 and reservoir 22. The outer side of the bearing housingis sealed by means of a plate 34 so that the bearing is enclosed in atightly sealed leak-proof chamber. The bearing within the housing 24 maybe of any suitable type as, for example, a pair of roller bearings ofreverse tapers to ensure against side thrust in either direction. Thewall 34 is provided with a seal 36. The bearing housing is also providedwith a lubricant supply duct 36a.

The inner side of the bearing housing 28 seals tightly against the shaftI! at 31 and is closed on the opposite side by means of the closureplate 38 which is provided with a lubricant or grease duct 39 to fillthe bearing housing. The bearings in the outer housing may be of anysuitable type as, for example, the roller bearing 4|! which need notsupport any thrusts of the shaft H.

A drive sprocket 4| may be mounted on the shaft ll between the bearinghousings 24 and 28 as shown in Fig. 2, or may be mounted in an extensionof the shaft l1 beyond the outer hearing housing'28 as shown in Fig. 3.A toothed collar 42 may also be provided between the bearing housings 24and 28 to lock the shaft II from I rotation by the usual or anysuitablemeans. The

, ing housing 28 and may, therefore, be of split construction as shownin Fig. 4, so that they may be removed from the shaft after being slidout of fixed and unvarying position.

ing.

their positioning opening'in the wall I 8; or they may be arranged to beremoved from the end in the standard 21. I

Through the above invention I have therefore provided a pair of spacedbearings for the pinion drive shaft which fit into recesses or openingsintegrally mounted on the base and. therefore of Replacement of thebearings in their prepared openings and securing them in positiontherein ensures an accurate alignment of the shaft and pinion. Thisarrangement also permits the shaft to be withdrawn or partly withdrawn,together with the pinion mounted on it, so that it may be easilyrepaired or inspected. The bearings are also freely exposed forinspection and repair and for maintaining them effectively filled withlubricant. As their lubrication is independent of that in the chamber l8and reservoir 22, a lubricant may be employed particularly adapted forthe bearings independently of the requirements of lubricant for thepinion I6 and gear I5.

What I claim is:

1. In a rotary machine of the type used in drilling oil wells, thecombination of: a base; a rotary table rotatably supported on said base;a pinion shaft; means whereby said pinion shaft rotates said rotarytable; a cylindrical housing supported by said base; a bearing forrotatably supporting said pinion shaft; and a bearing retainer supportedinside said cylindrical housing, said bearing retainer inclosing saidbearing, said bearing retainer providing a lubricant chamber for saidbearing, and said bearing retainer comprising two parts adapted to besecured together around said bearing after said bearing has been securedon said pinion shaft.

2. In a notary machine of the type used in drilling; oil wells, thecombination of: a base; a rotary tabl'e rotatably supported on saidbase; a pinion'shaft; means whereby said pinion shaft rotates saidrotary table; a cylindrical housing supported by said base; a bearingfor rotatably supporting said pinion shaft; and a bearing retainersupported inside said cylindrical housing, said bearing retainerinclosing said bearing, said bearing retainer providing a lubricantchamber for said bearing, and said bearing retainer comprising two partsadapted to be secured together around said bearing after said hearinghas been secured on said pinion shaft, said parts providing acylindrical wall adapted to support said hearing, and two side wallsextending inwardly to said pinion shaft on opposite sides of saidbearing and spaced therefrom so that said lubricant chamber is formed onopposite sides of said bear- 3. In a rotaryv machine of the 'ty'pe usedin drilling oil wells, the combination of: a base; a rotary tablerotatably supported on said base; a

pinion shaft; means whereby said pinion shaft rotates said rotary table;a cylindrical housing supported by said base; a bearing means includinginner and outer races and bearing elements therebetween for rotatablysupporting said pinion shaft; and a bearing retainer supported insidesaid cylindrical housing, said bearing retainer having inwardlyextending walls for inclosing said bearing means, and said bearingretainer providing'a lubricant chamber for said bearing.

